Update Spark to 0.8.1 and add hadoop2.2 profile
Merge services files when building assembly JAR
Wholeheartedly make Hadoop 2.2.0 the default
Add explicit dependency on scala-library 2.9.3
Merge pull request #53 from jey/hadoop22-fix

Fix Hadoop 2.2.0 support, upgrade to Spark 0.8.1
Added the "tags" command, and parsing for BAM attributes.

Added code (in Attribute and AttributeUtils) to parse attributes -- the optional fields at the end of a SAM record -- from the string which is stored in the ADAMRecord.

Updated the adam-cli project with a command, 'tags', that reads an ADAMRecord set and prints the total set of tags found in the set, along with the number of times each tag appears.